abdullah I've experienced the same during hot summer days where I live. It would get so hot I could burn my fingers if I touched it for long enough…
Same here, and I realised it mostly had to do with where my phone was positioned in the car and if my sunroof was open/uncovered by the sun block. In that case, the sun was directly shining on my phone, which was the main cause of overheating.
FredoFr is your phone in direct sunlight while its connected to Android Auto?
FredoFr barely charges at all.
This is normal, most cars don't have fast charging for the Android Auto or Carplay USB port connection.